What is the role of the 'front' pointer in a queue data structure?
It points to the element that has been in the queue the longest.
It determines if the queue is full or not.
It keeps track of the total number of elements in the queue.
It points to the location where the next element will be added.
What is the primary characteristic that distinguishes a queue from other linear data structures?
Elements are added and removed from the same end.
It is a sorted data structure.
It allows for random access of elements.
Elements are added at one end and removed from the other.
What value does the 'isEmpty' operation on a queue return if the queue contains no elements?
True
0
The first element in the queue
-1
Which real-world scenario best exemplifies the use of a queue data structure?
Storing a family tree with ancestors and descendants
Tracking the order of tasks assigned to a CPU
Finding the shortest route between two points
Managing a list of students sorted alphabetically
What is a potential drawback of implementing a queue using an array with a fixed size?
Inability to store elements of different data types.
Requirement of complex algorithms for insertion and deletion.
Risk of queue overflow if the queue reaches its maximum capacity.
Increased time complexity for enqueue and dequeue operations.
How does an array-based queue handle the underflow condition?
By overwriting the existing elements.
By using a circular array to reuse the empty spaces.
By raising an exception or returning an error value when attempting to dequeue from an empty queue.
By dynamically resizing the array.
Which of the following real-world scenarios can be effectively modeled using a queue?
Handling customer service requests in a first-come, first-served manner.
Managing a priority-based task list.
Storing the browsing history in a web browser.
Implementing an undo/redo functionality in a text editor.
What happens to the elements in an array-based queue after a dequeue operation?
The array is resized to accommodate the removal of the element.
The remaining elements are shifted one position towards the front of the array.
The 'front' pointer is adjusted to point to the next element in the queue, effectively removing the first element logically.
The dequeued element is marked as deleted but remains in the array.
What is the purpose of the 'front' pointer in an array implementation of a queue?
It tracks the total number of elements in the queue.
It points to the most recently added element.
It points to the next available empty location.
What is the primary disadvantage of using an array to implement a queue?
Fixed size limitation
Inefficient search operations
Complex implementation
High memory usage